Bramble fix - game examples included

[CombatEX]

I feel like this change may be too restrictive and limit some interesting strategies as a result (and also be too weak). I do feel that the general premise is sound though. Maybe thorns are limited to one child, but the bramble is not? This way the bramble can have multiple 'branches', but each branch can only spawn thorns from the youngest child each turn.

This would mean that each turn you can spawn one thorn directly from the bramble (starting a new 'branch') and grow any existing branches from the youngest child in the branch.

This change would greatly restrict the exponential growth of bramble thorns while maintaining the potential to harass with multiple thorns in a single turn.